package com.sunlei.webtest.controller;

/**
 * Created by 001 on 2017/7/22.
 */

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

import java.io.*;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

import java.io.*;

/**
 * Created by 001 on 2017/7/22.
 */
public class img {
    /**
     * @Title: GetImageStrFromPath
     * @Description: TODO(将一张本地图片转化成Base64字符串)
     * @param imgPath
     * @return
     */
    public static String GetImageStrFromPath(String imgPath) {
        InputStream in = null;
        byte[] data = null;
        // 读取图片字节数组
        try {
            in = new FileInputStream(imgPath);
            data = new byte[in.available()];
            in.read(data);
            in.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        // 对字节数组Base64编码
        BASE64Encoder encoder = new BASE64Encoder();
        // 返回Base64编码过的字节数组字符串
        return encoder.encode(data);
    }

    //base64字符串转化成图片
    public static boolean GenerateImage(String imgStr)
    {   //对字节数组字符串进行Base64解码并生成图片
        if (imgStr == null) //图像数据为空
            return false;
        BASE64Decoder decoder = new BASE64Decoder();
        try
        {
            //Base64解码
            byte[] b = decoder.decodeBuffer(imgStr);
            for(int i=0;i<b.length;++i)
            {
                if(b[i]<0)
                {//调整异常数据
                    b[i]+=256;
                }
            }
            //生成jpeg图片
            String imgFilePath = "d://222.jpg";//新生成的图片
            OutputStream out = new FileOutputStream(imgFilePath);
            out.write(b);
            out.flush();
            out.close();
            return true;
        }
        catch (Exception e)
        {
            return false;
        }
    }
}
